SiO2@FeSO4 nano composite: A recoverable nano-catalyst for eco-friendly synthesis oximes of carbonyl compounds

Abstract

Various aldoximes and ketoximes synthesis of corresponding aldehydes and ketones in the presence of SiO₂@FeSO₄ nano composite as recoverable nano catalyst and NH₂OH·HCl. The SiO₂@FeSO₄ nano composite system was carried out between 10 to 15 min in oil bath (70-80 °C) under solvent-free condition in excellent yields in addition this protocol can be used for industrial scales. This method offers some advantages in term of clean reaction conditions, easy work-up procedure, short reaction time, applied to convert α-diketones to α-diketoximes (as longer than other carbonyl compounds), α,β-unsaturated aldehydes and ketones to corresponding oximes and suppression of any side product. So we think that NH₂OH•HCl/SiO₂@FeSO₄ nano composite system could be considered a new and useful addition to the present methodologies in this area. Structure of products and nano composite elucidation was carried out by ¹H NMR, ¹³C NMR, FT-IR, scanning electron microscopy (SEM).